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Teledyne API – Model T300/T300M CO Analyzer Theory of Operation
307
The CPU issues commands via a series of relays and switches (also over the I
2
C bus)
located on a separate printed circuit assembly to control the function of key
electromechanical devices such as heaters, motors and valves.
The CPU communicates with the user and the outside world in several ways:
Through the analyzer’s front panel LCD touch-screen interface
RS-232 and RS-485 serial I/O channels
Various analog voltage and current outputs
Several digital I/O channels
Ethernet
06864B DCN6314